MacroAssemblerCodeRef.h [plain text]
#ifndef MacroAssemblerCodeRef_h
#define MacroAssemblerCodeRef_h
#include "ExecutableAllocator.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/UnusedParam.h>
#if CPU(ARM_THUMB2)
#define ASSERT_VALID_CODE_POINTER(ptr) \
ASSERT(reinterpret_cast<intptr_t>(ptr) & ~1); \
ASSERT(reinterpret_cast<intptr_t>(ptr) & 1)
#define ASSERT_VALID_CODE_OFFSET(offset) \
ASSERT(!(offset & 1)) #else
#define ASSERT_VALID_CODE_POINTER(ptr) \
ASSERT(ptr)
#define ASSERT_VALID_CODE_OFFSET(offset) // Anything goes!
#endif
#if CPU(X86) && OS(WINDOWS)
#define CALLING_CONVENTION_IS_STDCALL 1
#ifndef CDECL
#if COMPILER(MSVC)
#define CDECL __cdecl
#else
#define CDECL __attribute__ ((__cdecl))
#endif // COMPILER(MSVC)
#endif // CDECL
#else
#define CALLING_CONVENTION_IS_STDCALL 0
#endif
#if CPU(X86)
#define HAS_FASTCALL_CALLING_CONVENTION 1
#ifndef FASTCALL
#if COMPILER(MSVC)
#define FASTCALL __fastcall
#else
#define FASTCALL __attribute__ ((fastcall))
#endif // COMPILER(MSVC)
#endif // FASTCALL
#else
#define HAS_FASTCALL_CALLING_CONVENTION 0
#endif // CPU(X86)
namespace JSC {
class FunctionPtr {
public:
FunctionPtr()
: m_value(0)
{
}
template<typename returnType>
FunctionPtr(returnType(*value)())
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1>
FunctionPtr(returnType(*value)(argType1))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2>
FunctionPtr(returnType(*value)(argType1, argType2))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2, typename argType3>
FunctionPtr(returnType(*value)(argType1, argType2, argType3))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2, typename argType3, typename argType4>
FunctionPtr(returnType(*value)(argType1, argType2, argType3, argType4))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
#if CALLING_CONVENTION_IS_STDCALL && !OS(WINDOWS)
template<typename returnType>
FunctionPtr(returnType (CDECL *value)())
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1>
FunctionPtr(returnType (CDECL *value)(argType1))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2>
FunctionPtr(returnType (CDECL *value)(argType1, argType2))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2, typename argType3>
FunctionPtr(returnType (CDECL *value)(argType1, argType2, argType3))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2, typename argType3, typename argType4>
FunctionPtr(returnType (CDECL *value)(argType1, argType2, argType3, argType4))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
#endif
#if HAS_FASTCALL_CALLING_CONVENTION
template<typename returnType>
FunctionPtr(returnType (FASTCALL *value)())
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1>
FunctionPtr(returnType (FASTCALL *value)(argType1))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2>
FunctionPtr(returnType (FASTCALL *value)(argType1, argType2))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2, typename argType3>
FunctionPtr(returnType (FASTCALL *value)(argType1, argType2, argType3))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
template<typename returnType, typename argType1, typename argType2, typename argType3, typename argType4>
FunctionPtr(returnType (FASTCALL *value)(argType1, argType2, argType3, argType4))
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
#endif
template<typename FunctionType>
explicit FunctionPtr(FunctionType* value)
: m_value((void*)value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
void* value() const { return m_value; }
void* executableAddress() const { return m_value; }
private:
void* m_value;
};
class ReturnAddressPtr {
public:
ReturnAddressPtr()
: m_value(0)
{
}
explicit ReturnAddressPtr(void* value)
: m_value(value)
{
ASSERT_VALID_CODE_POINTER(m_value);
}
explicit ReturnAddressPtr(FunctionPtr function)
: m_value(function.value())
{
ASSERT_VALID_CODE_POINTER(m_value);
}
void* value() const { return m_value; }
private:
void* m_value;
};
class MacroAssemblerCodePtr {
public:
MacroAssemblerCodePtr()
: m_value(0)
{
}
explicit MacroAssemblerCodePtr(void* value)
#if CPU(ARM_THUMB2)
: m_value(reinterpret_cast<char*>(value) + 1)
#else
: m_value(value)
#endif
{
ASSERT_VALID_CODE_POINTER(m_value);
}
static MacroAssemblerCodePtr createFromExecutableAddress(void* value)
{
ASSERT_VALID_CODE_POINTER(value);
MacroAssemblerCodePtr result;
result.m_value = value;
return result;
}
static MacroAssemblerCodePtr createLLIntCodePtr(void (*function)())
{
return createFromExecutableAddress(bitwise_cast<void*>(function));
}
explicit MacroAssemblerCodePtr(ReturnAddressPtr ra)
: m_value(ra.value())
{
ASSERT_VALID_CODE_POINTER(m_value);
}
void* executableAddress() const { return m_value; }
#if CPU(ARM_THUMB2)
void* dataLocation() const { ASSERT_VALID_CODE_POINTER(m_value); return reinterpret_cast<char*>(m_value) - 1; }
#else
void* dataLocation() const { ASSERT_VALID_CODE_POINTER(m_value); return m_value; }
#endif
bool operator!() const
{
return !m_value;
}
private:
void* m_value;
};
class MacroAssemblerCodeRef {
private:
explicit MacroAssemblerCodeRef(MacroAssemblerCodePtr codePtr)
: m_codePtr(codePtr)
{
ASSERT(m_codePtr);
}
public:
MacroAssemblerCodeRef()
{
}
MacroAssemblerCodeRef(PassRefPtr<ExecutableMemoryHandle> executableMemory)
: m_codePtr(executableMemory->start())
, m_executableMemory(executableMemory)
{
ASSERT(m_executableMemory->isManaged());
ASSERT(m_executableMemory->start());
ASSERT(m_codePtr);
}
static MacroAssemblerCodeRef createSelfManagedCodeRef(MacroAssemblerCodePtr codePtr)
{
return MacroAssemblerCodeRef(codePtr);
}
static MacroAssemblerCodeRef createLLIntCodeRef(void (*function)())
{
return createSelfManagedCodeRef(MacroAssemblerCodePtr::createFromExecutableAddress(bitwise_cast<void*>(function)));
}
ExecutableMemoryHandle* executableMemory() const
{
return m_executableMemory.get();
}
MacroAssemblerCodePtr code() const
{
return m_codePtr;
}
size_t size() const
{
if (!m_executableMemory)
return 0;
return m_executableMemory->sizeInBytes();
}
bool operator!() const { return !m_codePtr; }
private:
MacroAssemblerCodePtr m_codePtr;
RefPtr<ExecutableMemoryHandle> m_executableMemory;
};
}
#endif // MacroAssemblerCodeRef_h